1 /* $NetBSD: if_tun.h,v 1.5 1994/06/29 06:36:27 cgd Exp $ */ 2 3 /*- 4 * Copyright (c) 1988, Julian Onions <jpo@cs.nott.ac.uk> 5 * Nottingham University 1987. 6 * 7 * This source may be freely distributed, however I would be interested 8 * in any changes that are made. 9 * 10 * This driver takes packets off the IP i/f and hands them up to a 11 * user process to have its wicked way with. This driver has it's 12 * roots in a similar driver written by Phil Cockcroft (formerly) at 13 * UCL. This driver is based much more on read/write/select mode of 14 * operation though. 15 * 16 * $FreeBSD$ 17 */ 18 19 #ifndef _NET_IF_TUN_H_ 20 #define _NET_IF_TUN_H_ 21 22 /* Refer to if_tunvar.h for the softc stuff */ 23 24 /* Maximum transmit packet size (default) */ 25 #define TUNMTU 1500 26 27 /* Maximum receive packet size (hard limit) */ 28 #define TUNMRU 65535 29 30 struct tuninfo { 31 int baudrate; /* linespeed */ 32 unsigned short mtu; /* maximum transmission unit */ 33 u_char type; /* ethernet, tokenring, etc. */ 34 u_char dummy; /* place holder */ 35 }; 36 37 /* ioctl's for get/set debug */ 38 #define TUNSDEBUG _IOW('t', 90, int) 39 #define TUNGDEBUG _IOR('t', 89, int) 40 #define TUNSIFINFO _IOW('t', 91, struct tuninfo) 41 #define TUNGIFINFO _IOR('t', 92, struct tuninfo) 42 #define TUNSLMODE _IOW('t', 93, int) 43 #define TUNGIFNAME _IOR('t', 93, struct ifreq) 44 #define TUNSIFMODE _IOW('t', 94, int) 45 #define TUNSIFPID _IO('t', 95) 46 #define TUNSIFHEAD _IOW('t', 96, int) 47 #define TUNGIFHEAD _IOR('t', 97, int) 48 49 #endif /* !_NET_IF_TUN_H_ */ 50